Need help with backticks script!!!

Using system_cmd.pl as a starting point,
rename the script as blast_grep.pl
Add comments to explain the code you write.
You will lose points for inadequate comments.

Make the following modifications to the script:
a. Remove the code that creates a file with numbered lines
b. Using backtics, run the command `grep JAY291 $file.blastn` and capture the results of the grep in an array
c. For each element in the resulting array, print a substring of the array element that includes only the GI number (use substr).
(Note that in general, substr is not a good way to extract GI numbers as they may vary in length…we’ll learn a better way soon.)
d. To make the script more flexible, add code to accept a second command line argument that
replaces the hard-coded JAY291 in the grep command. Example runs with output might
look like this: